HAND TAMPER FOR TAMPING A TRACK
A hand tamper for tamping ballast of a track comprises a shaft tube (3) in which a shaft (9) is supported which, at a lower end (4), is equipped with an imbalance (11). At least 30% of an overall height hu, extending in the longitudinal shaft direction (12), of the imbalance (11) is arranged below the upper edge (6) of a tamping blade (5).
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The invention relates to a hand tamper for tamping ballast of a track, including a drive motor for rotating a shaft which has a longitudinal shaft direction and is supported in a shaft tube and comprises an imbalance, the shaft being equipped at a lower end spaced from the drive motor with an imbalance, wherein the shaft tube is connected at a lower end spaced from the drive motor to a tamping blade which has an upper edge and a lower edge, with regard to the longitudinal shaft direction, the latter being spaced farther from the drive motor.
A hand tamper of this type is already disclosed in AT 239 296. The imbalance located in the shaft tube is situated above the tamping blade, with the latter being connected at its upper end to the shaft tube.
It is the object of the present invention to provide a hand tamper of the type mentioned at the beginning with which an improved compaction effect can be obtained.
According to the invention, this object is achieved with a hand tamper of the specified kind in that at least 30% of an overall height hu, extending in the longitudinal shaft direction, of the imbalance is arranged below the upper edge of the tamping blade.
As a result of shifting the vibrations effected by the imbalance into the blade region in this manner, it is possible to achieve a significantly improved compaction of the ballast. Additionally, the vibratory impact upon the handles positioned in the upper end region of the hand tamper is reduced.
Additional advantages of the invention become apparent from the dependent claims and the drawing description.
The invention will be described in more detail below with reference to embodiments represented in the drawing in which
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Claims
1. A hand tamper for tamping ballast of a track, including a drive motor for rotating a shaft which has a longitudinal shaft direction and is supported in a shaft tube and comprises an imbalance, the shaft being equipped—at a lower end spaced from the drive motor—with an imbalance, wherein a shaft tube is connected at a lower end spaced from the drive motor to a tamping blade which has an upper edge and a lower edge, with regard to the longitudinal shaft direction, the latter being spaced farther from the drive motor, wherein at least 30% of an overall height hu, extending in the longitudinal shaft direction, of the imbalance is arranged below the upper edge of the tamping blade.
2. The hand tamper according to claim 1, wherein the lower end of the shaft tube and the imbalance extend into a lower half of the tamping blade.
3. The hand tamper according to claim 1, wherein the lower end of the shaft tube ends at the lower edge of the tamping blade, and more than 50% of the overall height hu of the imbalance is arranged between the upper and lower edge of the tamping blade.
4. The hand tamper according to claim 1, wherein a blade plane of the tamping blade is arranged parallel to the longitudinal shaft direction.
5. The hand tamper according to claim 1, wherein the lower edge of the shaft tube is connected to a rear side—with regard to a tamping direction—of the tamping blade.
6. The hand tamper according to claim 1, wherein the lower end of the shaft tube is shaped so as to have a point which is tapered cone-like toward the lower edge of the tamping blade.
7. The hand tamper according to claim 1, wherein at the lower edge of the shaft tube, a stabilizing fin is provided which extends perpendicularly to the blade plane of the tamping blade and in the longitudinal shaft direction.
Type: Application
Filed: Jan 4, 2012
Publication Date: Oct 17, 2013
Applicant: ROBEL BAHNBAUMASCHINEN GMBH (Freilassing)
Inventor: Otto Widlroither (Freilassing)
Application Number: 13/995,341